Brooks is also avoiding casting huge names in the show because of what happened with THE PRODUCERS.
Everyone wanted to see Nathan and Matthew and the ticket sales dropped considerably after they left. Only when they came back did sales pick up again.
By casting lesser known names, people will want to see the show for the show and not for the two leads. That way, no matter who you bring in, the show sells.
And the names in this show aren't exactly small.
"I love talking about nothing. It is the only thing I know anything about." - Oscar Wilde